Reference point: Crito, 43a, and Phaedo, 59d. Other historical sources attests to such visits. See Xenophon, Memorabilia, 4.8.2.
reference-type: Book
author: Jowett, Benjamin
year: 1875
title: Dialogues of Plato
place-published: Oxford
publisher: Clarendon Press
otx-key: Jowett-1875
Full text: http://www.gutenberg.org/files/1643/1643-h/1643-h.htm